americans are counting on you. >> giffords' husband, mark kelly, also testified. so did nra head juan wayne la p and also the chief of baltimore county, the chairman of the national law enforcement partnership to prevent gun violence. he joins us right now. chief, you are really on the front lines of this gun debate so i want to ask you, if you could get one thing, change one thing when it comes to guns and gun violence, what's the one measure you would choose? >> well, it's definitely going to be a universal background check. i think most in law enforcement would agree that a universal background check certainly would make it more difficult for people who are trying to get weapons, keep them out of their hands. in fact from 1994 to 2009, nearly two million prohibited purchases were stopped. so we know this is going to work. obviously increasing penalties for those who try to straw purchase for someone else, i really think this will have a tremendous impact. >> so wayne la pierre of the nra doesn't agree with you. at the hearing yesterday he said that criminals wi